I think I get it now, thanks for taking the time to explain :)

Edit: actually thinking about it, I think the "feature flags" wording is what kind of confused me, as it's usually used for developers, infrastructure and product teams to roll out changes, not for deciding what features should/should not be activated in the product because of the pricing/plans.

It's a pattern of ephemeral switches, that are meant to eventually be removed, while what you're doing are "permanent" flags, not meant to be temporary in order to roll out changes without breaking things.